GitHub commits aren't recorded in the 'Your Contributions` calendar

I've been making continuous commits to my

GitHub

repos from my linux shell and they show up nicely on the website just as they should. The only problem is that "Your Contributions" section doesn't show any recent activity. I have one green square from some day in November which I don't know how I got but all the other contributions don't show up in the calendar (but again, they do show up in their repos.

This is a Github issue where sometimes their update mechanisms don't work and it turns into a "stale cache". This is nothing serious, simply send an email to support@github.com describing the issue and they'll fix it right away.